In the wake of the John Brown raid on Harpers Ferry, an atmosphere of hysteria and suspicion gripped South Carolina, an atmosphere in which large-scale slave insurrections or invasions of Northern fanatics seemed imminent. Mass arrests, feverish attempts to arm for self-defense, vigilante actions and irrational accusations became the order of the day. Far more than ideological or economic motives, it was this atmosphere, Steven Channing argues, that predisposed South Carolinians toward the great defiance that would end the Union. It provided the framework in which the radical politicians, at once exploiting the fear and dominated by it, were able to outmaneuver the Unionists and bring about secession.